초록 ▼

Prior to pumping completion brine fluid into a wellbore, an additive comprising two percent (2%) of a 0.25% solution of polyacrylamide is blended into the completion brine fluid thereby producing a treated brine fluid. This blending would be performed in tanks at the wellsite. The treated brine flui

Prior to pumping completion brine fluid into a wellbore, an additive comprising two percent (2%) of a 0.25% solution of polyacrylamide is blended into the completion brine fluid thereby producing a treated brine fluid. This blending would be performed in tanks at the wellsite. The treated brine fluid is then pumed into the wellbore. In addition, or in the alternative, a new perforating gun stores the polyacrylamide additive composition. When the perforating gun detonates, the additive is disbursed into the completion brine fluid disposed in the annulus of the wellbore. For example, the new perforating gun may include a plurality of shaped charges coated with a lacquer of the polyacrylamide additive, or it may include one or more containers which contain the polyacrylamide additive. When the brine completion fluid is pumped into the wellbore annulus, a detonation wave conducts in a detonating cord of the perforating gun. The detonation wave passes through each of the containers. As a result, the containers will rupture and the plurality of shaped charges will detonate. Since the containers each ruptured, the polyacrylamide additive composition from the containers will be disbursed into the brine completion fluid in the annulus. In addition, or in the alternative, since the shaped charges of the new perforating gun were coated with a lacquer of the polyacrylamide composition, when the shaped charges detonated, the polyacrylamide composition on the zinc charge debris mixes with the brine fluid in the wellbore annulus. Zinc oxychloride hydrate debris is formed as a reaction product. However, the presence of the polyacrylamide additive in the zinc oxychloride hydrate debris will inhibit the formation of hardened chunks of a cement-like material in the annulus of the wellbore.

대표청구항 ▼

A method of delaying a formation of a hardened cement like material in a brine completion fluid disposed in a wellbore, comprising the steps of: mixing a solution of polyacrylamide with the brine completion fluid at a surface of the wellbore; following the mixing step, pumping the mixed solution of

A method of delaying a formation of a hardened cement like material in a brine completion fluid disposed in a wellbore, comprising the steps of: mixing a solution of polyacrylamide with the brine completion fluid at a surface of the wellbore; following the mixing step, pumping the mixed solution of said polyacrylamide and said brine completion fluid into said wellbore; and when said mixed solution is pumped into said wellbore, further mixing a charge debris with said mixed solution in said wellbore, said mixed solution delaying said formation of said hardened cement like material in the brine fluid. A wellbore apparatus adapted to be disposed in a wellbore containing a brine fluid, comprising: a charge adapted to detonate; and a storage apparatus adapted for storing a solution of polyacrylamide and for disbursing said solution of polyacrylamide into said brine fluid when said charge detonates.